Im thinking of switching back to BT from NTL. We have a BT master socket downstairs from when we prev had a BT line in the house. When we moved in we cut off the BT line and had NTL install one of there lines and several extra points around the house. Question i have is will the extra boxes NTL put in work if i have the BT line put in or will BT have to rewire the whole lot and put there own in?